Table 2. pH of Aquarium Water During Chronic Treatment with Lead Nitrate.
| Study Day: -1 | TANK: A | TANK: B | TANK: C | TANK: D |
|---|---|---|---|---|
| 5.7 | 5.3 | 6.0 | 5.3 | |
| 7 | 5.2 | 5.6 | 6.5 | 5.4 |
| 16 | 5.6 | 5.6 | 6.4 | - |
| 20 | 5.3 | 5.5 | 6.3 | - |
| 25 | - | - | 5.6 | - |
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